/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-light: #3b82f6;
      --secondary: #0284c7;
      --accent: #059669;
      --dark-slate: #0B0F19;
      --card-border: rgba(226, 232, 240, 0.85);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: #0f172a;
      background-color: #f8fafc;
      overflow-x: hidden;
      line-height: 1.75;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(30, 64, 175, 0.15) 0%, rgba(2, 132, 199, 0.05) 50%, rgba(248, 250, 252, 0) 100%);
    }
    .dark-glow {
      background: radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.18) 0%, rgba(5, 150, 105, 0.08) 50%, rgba(11, 15, 25, 0) 100%);
    }
    .custom-shadow {
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 20px 25px -5px rgba(0, 0, 0, 0.05);
    }
    .code-editor {
      background: #0d1117;
      border: 1px solid #30363d;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }
    .line-numbers {
      user-select: none;
      color: #484f58;
    }